Patent GB-1130824-A (GB)
Title: Organosilicon polymers
Inventor: STUART RONALD SANGSTER
IPC: C08F8/42
Filed: 1966-01-21
Abstract: 1,130,824. Polymers, polyurethane foams. IMPERIAL CHEMICAL INDUSTRIES Ltd. 20 Jan., 1967 [21 Jan., 1966], No. 2841/66. Headings C3C, C3P and C3R. Organosilicon polymers, particularly useful as surfactants in the manufacture of polyurethane foams, have the general unit formula in which at least one group R has the general formula and of the remaining R groups at least one is a hydrocarbyl or substituted hydrocarbyl group and any remaining R groups may be polyoxyalkylene groups of the formula (C n H 2n O) y - R<SP>IV</SP> where n is 2, 3 or 4, y is an integer from 2 to 100 inclusive and R<SP>iv</SP> is a hydrocarbyl group, a substituted hydrocarbyl group or an acyl group, R<SP>1</SP> is an alkylene group having at least 2 carbon atoms, R<SP>11</SP> is a hydrocarbyl or substituted hydrocarbyl group, R<SP>111</SP> is a hydrocarbyl group, a substituted hydrocarbyl group or a polyoxyalkylene group of the kind described and at least one group R<SP>111</SP> is a polyoxyalkylene group of the kind described, except when the polymer contains one or more other such units in which R is such a polyoxyalkylene group in which case x may be 3 otherwise x is 0, 1 or 2. These polymers may be obtained by copolymerizing a vinyl ether of formula CH = CHOR, where R is hydrocarbyl or substituted hydrocarbyl with another vinyl ether of formula CH = CHOR<SP>v</SP>, where R<SP>v</SP> is an alkenyl group and thereafter reacting with either a silane of general formula in which a proportion of R<SP>111</SP> are polyoxyalkylene or there being introduced by subsequent reaction, e.g. by transesterification using trifluoroacetic acid or an alkali metal salt thereof (see Examples 1 and 2) or with a halogenosilane of the general formula and subsequently reacting with a mono-ol of the formula R<SP>111</SP>OH in the presence of an acid acceptor. Alternatively the polyoxyalkyene groups may be introduced into the polymer by copolymerizing the vinyl ethers with a third monomer of formula and subsequently reacting with a suitable silane. The polymerization of the vinyl ethers is by conventional methods. The examples describe the production of foamed polyurethanes. It is stated that the polymers are valuable as foam stabilizing agents in the one-stage process for the production of foams from polyethers in which a major proportion of the hydroxyl end groups are secondary hydroxyl groups. Polyurethane foams are prepared in examples from (1 and 2) oxypropylated glycerol, tolylene diisocyanates water, stannous octoate and triethylenediamine; and (3) oxypropylated sorbitol, 4,4<SP>1</SP>-diisocyanatodiphenyl methane, trichlorofluoromethane, glycerol, tri - # - chlorethyl phosphate, triethylenediamine and dipropylene glycol; using as foam stabilizers reaction products of (1) allyl vinyl ether/nbutyl vinyl ether copolymer, triisobutoxysilane and n-butanol/ethylene oxide/propylene oxide adduct, (2) allyl vinyl ether/isobutyl vinyl ether copolymer, methyl diisobutoxysilane and n-butanol/ethylene oxide/propylene oxide adduct; and (3) allyl vinyl ether/vinyl ether of polyoxyethylated ethylene glycol monomethyl ether copolymer and methyl diisobutoxysilane.